It has extensions like "Message carbons" and "Message archive management". Google Allo is launched in late 2016 and it is strictly bound to single device. This

It has extensions like "Message carbons" and "Message archive management". Google Allo is launched in late 2016 and it is strictly bound to single device. This is marketed as feature, because only geeks and rocket engineers use workstations, normies do internets on cellphone (and only terrorists and drug dealers have more than one cellphone).